189929689 has 2 divisors, whose sum is σ = 189929690. Its totient is φ = 189929688.

The previous prime is 189929659. The next prime is 189929741. The reversal of 189929689 is 986929981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173054025 + 16875664 = 13155^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 189929689 - 2¹⁵ = 189896921 is a prime.

It is not a weakly prime, because it can be changed into another prime (189929629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94964844 + 94964845.

It is an arithmetic number, because the mean of its divisors is an integer number (94964845).

Almost surely, 2^189929689 is an apocalyptic number.

It is an amenable number.

189929689 is a deficient number, since it is larger than the sum of its proper divisors (1).

189929689 is an equidigital number, since it uses as much as digits as its factorization.

189929689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 61.

The square root of 189929689 is about 13781.4980680621. The cubic root of 189929689 is about 574.8187849869.

The spelling of 189929689 in words is "one hundred eighty-nine million, nine hundred twenty-nine thousand, six hundred eighty-nine".